* To use this sketch, assemble MySensors nodes - they need nothing more than a radio
* 1. Flash each node with the same sketch, open the console and type either 0 or 1 to the respective nodes to set thei ID
* 2. You only need to set the node id once, and restart the nodes
* 3. To being a ping-pong test, simply type T in the console for one of the nodes.

Some documentation is missing:

You need to set the MY_NODE_ID to 201 or 200 when using it with ESP8266

You also need a Gateway, even when testing Node to Node ping pong

It's not clear what the expected result is, I'd expect something like Ping from node 200, then Pong! from node 201. But it would seem that it gives "Ying node", then "Yang node".

I'd start from the ethernet gateway and work it out from there, myscontroller works with ethernet gateway. In openhab I don't know how to enable auto id, but there must be something in documentation. To be honest assigning manually ID has to be done only once because it is saved in eeprom and read at every boot, so I don't see it so mandatory to have the controller handling it.

@gohan, do you mean http://www.mycontroller.org? I can't find any project page with downloads on the link you provided. There is a download link to a zip file somewhere in the comments but impossible to say if that is still up to date as it dates from 2015.